“The light of the sun is not a liquid; for if it were a liquid it would be possible to pour it from one vessel into another, and it would be moved, like water, by the wind. Neither is it fire; for if it were fire, water would extinguish it. Neither is light a spirit, for it is seen by the eye; nor is it matter, for it cannot be moved. Therefore, as the light of the sun is neither liquid, nor fire, nor spirit, nor matter, it is⁠—nothing!”

So he argued, and, as a result of always looking at the sun and always thinking about it, he lost both his sight and his reason. And when he went quite blind, he became fully convinced that the sun did not exist.

With this blind man came a slave, who after placing his master in the shade of a coconut tree, picked up a coconut from the ground, and began making it into a night-light. He twisted a wick from the fibre of the coconut: squeezed oil from the nut into the shell, and soaked the wick in it.

As the slave sat doing this, the blind man sighed and said to him: